1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright (C) 2016 The Android Open Source Project 4 */ 5 6 #ifdef AVB_INSIDE_LIBAVB_H 7 #error "You can't include avb_sha.h in the public header libavb.h." 8 #endif 9 10 #ifndef AVB_COMPILATION 11 #error "Never include this file, it may only be used from internal avb code." 12 #endif 13 14 #ifndef AVB_SHA_H_ 15 #define AVB_SHA_H_ 16 17 #ifdef __cplusplus 18 extern "C" { 19 #endif 20 21 #include "avb_crypto.h" 22 #include "avb_sysdeps.h" 23 24 /* Block size in bytes of a SHA-256 digest. */ 25 #define AVB_SHA256_BLOCK_SIZE 64 26 27 /* Block size in bytes of a SHA-512 digest. */ 28 #define AVB_SHA512_BLOCK_SIZE 128 29 30 /* Data structure used for SHA-256. */ 31 typedef struct { 32 uint32_t h[8]; 33 uint64_t tot_len; 34 size_t len; 35 uint8_t block[2 * AVB_SHA256_BLOCK_SIZE]; 36 uint8_t buf[AVB_SHA256_DIGEST_SIZE]; /* Used for storing the final digest. */ 37 } AvbSHA256Ctx; 38 39 /* Data structure used for SHA-512. */ 40 typedef struct { 41 uint64_t h[8]; 42 uint64_t tot_len; 43 size_t len; 44 uint8_t block[2 * AVB_SHA512_BLOCK_SIZE]; 45 uint8_t buf[AVB_SHA512_DIGEST_SIZE]; /* Used for storing the final digest. */ 46 } AvbSHA512Ctx; 47 48 /* Initializes the SHA-256 context. */ 49 void avb_sha256_init(AvbSHA256Ctx* ctx); 50 51 /* Updates the SHA-256 context with |len| bytes from |data|. */ 52 void avb_sha256_update(AvbSHA256Ctx* ctx, const uint8_t* data, size_t len); 53 54 /* Returns the SHA-256 digest. */ 55 uint8_t* avb_sha256_final(AvbSHA256Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT; 56 57 /* Initializes the SHA-512 context. */ 58 void avb_sha512_init(AvbSHA512Ctx* ctx); 59 60 /* Updates the SHA-512 context with |len| bytes from |data|. */ 61 void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, size_t len); 62 63 /* Returns the SHA-512 digest. */ 64 uint8_t* avb_sha512_final(AvbSHA512Ctx* ctx) AVB_ATTR_WARN_UNUSED_RESULT; 65 66 #ifdef __cplusplus 67 } 68 #endif 69 70 #endif /* AVB_SHA_H_ */ 71